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erastovalidia [21]
3 years ago
12

A 10.0-mL solution of 0.30 M NH3 is titrated with a 0.100 M HCl solution. Calculate the pH after the following additions of the

HCl solution:
a) 0.00 mL b) 10.0 mL c) 30.0 mL d) 40.0 mL
Chemistry
1 answer:
yulyashka [42]3 years ago
3 0
Iojioujuu0u909uoiohuy
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What is the empirical formula of a compound that is 18.8% Li, 16.3% C , and 64.9% O
zlopas [31]

Greetings!

To find the empirical formula you need the relative atomic mass of each element!

Li = 6.9

C = 12

O = 16

You can simply change the percentages into full grams

Li = 18.8g

C = 16.3g

O = 64.9


Then you use this to find the Number of moles = amount in grams / atomic mass

Li = 18.8 ÷ 6.9 = 2.7246

C = 16.3 ÷ 12 = 1.3583

O = 64.9 ÷ 16 = 4.0562

Then divide each number of moles by the smallest value:

Li = 2.7246 ÷ 1.3583 = 2.0

C = 1.3583 ÷ 1.3583 = 1

O = 4.0562 ÷ 1.3583 = 2.9 ≈ 3


So that means that there are 2 Li, 1 C, and 3 O

Empirical formula would be:

Li₂CO₃


Hope this helps!

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3 years ago
Which of the following represents the electron configuration of s⁻?
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Explanation:

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(pls help !!) question is in image
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